JP2018528443A - Rebar break detection device for utility poles - Google Patents

Abstract

[Technical Field] The present invention relates to a reinforcing bar breakage detecting device for a utility pole, in close contact with the outer surface in the circumferential direction of the utility pole, at a position corresponding to a plurality of reinforcing bars (3) embedded in the utility pole (1). A detection unit (10) for detecting an electric field generated from the data logger, a data logger unit (20) for receiving and storing magnetic field data to the reinforcing bar (3) detected by the detection unit (10), and a data logger unit (20) And a rupture state detection unit (30) for detecting a rupture state of the reinforcing bar (3) based on the amount of change in the magnetic field of the magnetic field data stored in. The present invention has an advantage that a plurality of reinforcing bar breakage state detecting operations can be performed simultaneously, and a reinforcing bar breakage state detecting operation for various utility poles having different diameters can be easily performed.
[Selection] Figure 3

Description

  The present invention relates to a reinforcing bar rupture detection device for electric poles, and more particularly to a reinforcing rod rupture detection device for electric poles that can detect a reinforcing bar rupture from a structure in which the reinforcing bars are embedded inside a concrete electric pole or the like.

  In general, most of the supports used in the distribution line are concrete poles and have a prestressed (PS) concrete structure. P. When the S concrete utility pole is used for a long time, there is an accident that the concrete collapses due to the breakage of the reinforcing bars inside the utility pole.

  P. Since the S concrete structure is designed to support the bending moment with the tensile force of the reinforcing bar, if the reinforcing bar inside the utility pole breaks and loses the tensile force, an accident occurs in which the concrete utility pole collapses.

  Recently, when an operator cuts a cable connected to a utility pole in order to replace a concrete utility pole, there is a case in which a safety accident occurs due to a sudden collapse of the utility pole due to the balance of force.

  P. In South Korea, which uses S-concrete utility poles, various devices such as transformers and switches are installed on the utility poles, so the risk of accidents due to breakage of the reinforcing bars inside the concrete is very high. Therefore, it is necessary to diagnose that the reinforcing bar in the concrete breaks and replace or reinforce the utility pole before a collapse accident occurs.

  As a related prior patent, Korean Published Patent No. 10-2014-0042240 (published on April 7, 2014) is available.

  However, the prior patent is a method for diagnosing a broken part of a reinforcing bar in a concrete utility pole using a sensor that is one of the functions of a smartphone. Then, there is a problem that it is difficult to diagnose rebar breaking.

  That is, as shown in FIG. 1a, when a rebar break P occurs at the top of the ground surface 2 of the concrete power pole 1, it is possible to detect the presence or absence of the rebar break by bringing the sensor into contact with the concrete power pole 1 as shown in FIG. 1b. As described above, when the reinforcing bar break P occurs in the lower part of the ground surface 2 of the concrete utility pole 1, the sensor cannot be contacted and the reinforcing bar break cannot be detected.

  In addition, prior patents not only have to place sensors sequentially along the circumference on the outer surface of the utility pole to inspect multiple rebars, but also move up and down to inspect the rebar in the length direction However, since the reinforcing bar breakage state must be inspected, there is a problem that workability is greatly lowered while working time is increased.

Korean Published Patent No. 10-2014-0042240

  Therefore, the object of the present invention is to closely contact the outer surface of a power pole from a structure in which reinforcing bars are embedded, for example, a concrete power pole, and detect a magnetic field generated from a plurality of reinforcing bars, thereby An object of the present invention is to provide a reinforcing bar breakage detecting device for a utility pole that can simultaneously detect a broken state of a reinforcing bar.

  Another object of the present invention is to provide a reinforcing bar rupture detection device for a utility pole that can easily perform a reinforcing bar rupture state detection operation for various utility poles having different diameters without replacement of a detection unit.

  According to a feature of the present invention for achieving the above object, the present invention is in close contact with the outer surface in the circumferential direction of the utility pole, and at a position corresponding to a plurality of reinforcing bars embedded in the utility pole, A detection unit that detects an electric field generated from a reinforcing bar, a data logger unit that receives and stores magnetic field data applied to the reinforcing bar detected by the detection unit, and a magnetic field change amount of magnetic field data stored in the data logger unit. And a breakage state detecting unit for detecting a breakage state of the reinforcing bars based on the above.

  The detection unit is configured to be coupled to a gripping portion that provides a gripping area for an operator, and to be pivotably coupled to one side of the gripping portion, and has one side surface on the outer circumferential surface of the power pole. A detection main body closely attached along the length of the detection main body and a plurality of electric field detection units installed at regular intervals along the length direction of the detection main body may be included.

  The detection main body may be formed so as to be curved by coupling a plurality of rotating blocks to each other via a fixing member.

  The fixing member may be configured by a bolt / nut system, and may fix a coupling state between adjacent rotating blocks and rotating blocks.

  The electric field detector may be installed on the rotating block.

  The detection unit includes a gripping part that provides a gripping area to an operator, a stabilizer bar that is fixed to one side extending from the gripping part, and that extends so that the other side is curved away from the gripping part. One side is pivotally coupled to one side extending from the gripping portion, the other side is connected to the stabilizer bar via elastic means, and one side surface is in close contact with the outer circumferential surface of the utility pole by elastic deformation A detection main body and a plurality of electric field detection units installed at regular intervals along the length direction of the detection main body may be included.

  The detection body may include a plurality of chain blocks that are coupled to each other via a rotation member, and an elastic band that is connected through the chain blocks.

  The electric field detector may be installed on the chain block.

  The present invention detects an electric field generated from a reinforcing bar at a position corresponding to a plurality of reinforcing bars embedded in the utility pole in close contact with the outer surface of the utility pole. Therefore, a plurality of reinforcing bar fracture states can be detected at the same time, so that the workability can be greatly improved.

  Further, according to the present invention, the detection main body is formed by connecting a plurality of rotating blocks, and the angle of each rotating block is fixed and is closely attached to the outer peripheral surface of the utility pole. Therefore, there is an effect that it is possible to easily perform the reinforcing bar breakage state detection operation for various utility poles having different diameters without replacing the detection unit.

  In the present invention, the detection main body is formed by coupling a plurality of chain blocks, and is closely attached to the outer peripheral surface of the utility pole by elastic deformation using elastic means and an elastic band. Therefore, the diameter gradually increases from the upper part to the lower part, and there is an effect that the reinforcing bar breakage state detection operation can be easily performed for the utility poles having different upper and lower outer diameters.

It is a figure which shows the reinforcing bar fracture example with respect to the ground surface upper part of a concrete electric pole. It is a figure which shows the reinforcing bar fracture | rupture example with respect to the ground surface lower part part of a concrete electric pole. It is a figure which shows the reinforcing bar fracture | rupture detection apparatus for utility poles which concerns on one Embodiment of this invention. It is a figure which shows the reinforcing bar fracture | rupture detection apparatus for utility poles which concerns on one Embodiment of this invention. It is a figure which shows the method of sticking one Embodiment of this invention along the outer surface of the circumferential direction of a utility pole, and detecting a reinforcing bar fracture. It is a graph which shows the magnetic field data with respect to the some rebar which detected the magnetic field using the reinforcing bar break detection device for electric poles concerning the present invention. It is a figure which shows the reinforcing bar fracture | rupture detection apparatus for utility poles which concerns on other embodiment of this invention. It is a figure which shows the method of sticking the other embodiment of this invention to the outer surface of the circumferential direction of a utility pole, and detecting a rebar break.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[One Embodiment]
As shown in FIGS. 2 and 3, in the electric pole reinforcing bar breakage detection apparatus according to an embodiment of the present invention, the detection unit 10 includes a data logger unit 20 and a breakage state detection unit 30.

  As shown in FIG. 4, the detection unit 10 is in close contact with the outer circumferential surface of the utility pole 1 and detects the electric field from the reinforcement 3 at a position corresponding to the plurality of reinforcements 3 embedded in the utility pole 1. .

  Inside the utility pole 1, a plurality of reinforcing bars 3 are embedded in a circular shape at regular intervals. The length of the reinforcing bar 3 embedded in the utility pole 1 is approximately 2.5 m (in the case of a 16 m utility pole) from the ground surface to the bottom.

  In the case as described above, when the magnetic field for the plurality of reinforcing bars 3 embedded in the utility pole 1 is detected while closely moving along the outer surface of the utility pole 1 in the circumferential direction, it is based on the amount of change in the electric field. Thus, the plurality of reinforcing bar 3 breakage state detection processes can be performed simultaneously.

  The principle is that it is possible to detect that the reinforcing bar 3 is in a broken state at a portion where the electric field change amount is abrupt in the length direction of the reinforcing bar 3.

  Further, when the magnetic poles are closely contacted with each other along the outer surface in the circumferential direction at a certain height and the magnetic fields with respect to the plurality of reinforcing bars 3 embedded in the utility pole 1 are detected, the ground is determined based on the relative electric field strength. Even when the reinforcing bar 3 on the lower surface is broken, it can be detected.

  The principle is that when magnetic field data for a plurality of reinforcing bars 3 is detected in a circumferential direction at a constant height above the ground surface of the utility pole 1, this is shown in a graph, and the strength of the electric field is compared to diagnose a broken reinforcing bar. be able to.

  Even when the reinforcing bar below the ground surface is broken, the broken reinforcing bar can be detected because a difference in electric field strength occurs between the broken reinforcing bar.

  Comparing the magnetic field strength of the reinforcing bars 3 in the circumferential direction, the non-ruptured reinforcing bars show almost the same magnetic field strength, but in the case of a reinforcing bar whose one part is broken, the magnetic field strength is not broken. There is a difference.

  The detection unit 10 includes a grip part 11, a detection main body 13, and a magnetic field detection part 19.

  The grip portion 11 is a portion that provides a grip area to the worker so that the worker can move the detection main body 13 in the vertical direction of the utility pole 1. The grip portion 11 can be formed in a bar shape having a predetermined length so that an operator can easily grip the grip portion 11.

  The detection main body 13 is rotatably coupled to one side of the grip portion 11. The detection main body 13 provides an installation area for the magnetic field detection unit 19 and is in close contact with the outer surface of the utility pole 1 so that the electric field detection unit 19 can detect the magnetic field of the reinforcing bar 3 embedded in the utility pole 1. To.

  The detection main body 13 can be formed so as to be curved into a shape corresponding to the outer surface of the utility pole 1 in the circumferential direction. The detection main body 13 is formed so as to be curved, whereby one side surface can be brought into close contact with the outer surface of the utility pole 1 in the circumferential direction.

  The detection main body 13 can be formed such that a plurality of rotating blocks 15 are coupled to each other via a fixing member 17 so as to be rotatable with respect to each other.

  The fixing member 17 connects the rotation block 15 to form the detection main body 13, and fixes the angle of the rotation block 15 connected to each other to a position corresponding to the reinforcing bar 3 embedded in the utility pole 1. A magnetic field detection unit 19 to be described later is arranged.

  As shown in FIG. 3, at both ends of each rotation block 15, a through hole 16 to which a fixing member 17 is coupled is provided, and the fixing member 17 can be configured by a general bolt 17a / nut 17b system.

  The fixing member 17 can be coupled to the passage holes 16 of the rotation block 15a and the rotation block 15b adjacent to each other to fix the coupled state of the rotation block 15a and the rotation block 15b.

  The magnetic field detection unit 19 can be composed of a plurality of units installed at regular intervals along the length direction of the detection main body 13.

  Specifically, the magnetic field detection unit 19 is installed on one side of the plurality of rotation blocks 15 and detects an electric field generated from the rebar 3 in a state where the plurality of rotation blocks 15 are in close contact with the outer surface of the utility pole 1. To do. The magnetic field detector 19 can be embedded and installed on one side of each rotating block 15. In the present embodiment, the magnetic field detector 19 is embedded in the center of each rotating block 15.

  The magnetic field detection unit 19 may be a magnetic sensor that measures a magnetic field that is a current generated from the reinforcing bar 3 by an electromagnetic induction phenomenon.

  As described above, the detection main body 13 can be formed so as to surround the outer surface of the utility pole 1 in the circumferential direction by coupling a plurality of rotation blocks 15. However, the detection main body 13 is preferably formed to have a length of about ½ of the circumferential size of the utility pole in consideration of noise generated between adjacent magnetic field detection units 19 during magnetic field detection. .

  The data logger unit 20 receives and stores magnetic field data applied to the reinforcing bars 3 detected by the detection unit 10. The data logger unit 20 is electrically connected to the detection unit 10 and substantially receives and stores magnetic field data applied to the reinforcing bars 3 detected by the magnetic field detection unit 19 of the detection unit 10.

  The rupture state detection unit 30 detects the rupture state of the reinforcing bars based on the amount of change in the magnetic field of the magnetic field data stored in the data logger unit 20. Specifically, the breakage state detection unit 30 is electrically connected to the data logger unit 20, can receive the magnetic field data stored in the data logger unit 20, and the magnetic field data stored in the data logger unit 20. The rupture state of the reinforcing bar is detected based on the amount of change in the magnetic field.

  The operation of the present invention will be described below.

  First, a method for detecting a reinforcing bar breakage by bringing the detection body into close contact with the outer surface of the utility pole in the circumferential direction will be described.

  For this reason, as shown in FIG. 4, one side surface of the rotating block 15 that is rotatably coupled to the gripping portion 11 among the plurality of rotating blocks 15 in a state where the operator grips the gripping portion 11 is connected to the utility pole. 1 is supported on the outer surface.

  Next, by rotating the remaining plurality of rotation blocks 15 in a direction in close contact with the outer surface of the utility pole 1, one side surface of the plurality of rotation blocks 15 is brought into close contact with the outer surface of the utility pole 1.

  Next, the fixing member 17 that connects the rotating blocks 15, that is, the bolts and nuts, are tightened to fix the rotating block 15 in a rotated state.

  Thereby, the state in which the detection main body 13 including the plurality of rotation blocks 15 is in close contact with the outer surface of the utility pole 1 can be maintained, and the magnetic field detection unit 19 installed in each rotation block 15 A magnetic field can be detected.

  Thereafter, as the grip portion 11 is moved upward, the plurality of rotating blocks 15 move upward, and the electric field detector 19 detects the magnetic field of the reinforcing bar 3 in the length direction.

  That is, when the gripping part 11 moves upward, the plurality of rotating blocks 15 connected to the gripping part 11 move upward in contact with the outer surface of the utility pole 1, so that the magnetic field generated from each rebar 3 is applied to the rebar 3. Can be detected along the length direction.

  The magnetic field data for the reinforcing bar 3 detected by the magnetic field detector 19 is stored in the data logger unit 20.

  The breakage state detection unit 30 detects a magnetic field change for each reinforcing bar 3 based on the magnetic field data stored in the data logger unit 20, and detects a broken state of the reinforcing bar based on the amount of change in the magnetic field.

  For example, when the magnetic field data in the length direction for any one of the plurality of reinforcing bars is shown, it can be detected that the reinforcing bar is in a broken state at a portion where the amount of change in the magnetic field is abrupt.

  Also, when comparing magnetic field data for a plurality of reinforcing bars detected in the circumferential direction at a constant height above the ground surface of the utility pole, if there is a difference in the electric field strength, the gripping part 11 must be gripped upward and not moved. However, it is possible to diagnose a broken reinforcing bar.

  As described above, in the present invention, the detection main body 13 is in close contact with the outer surface of the utility pole 1 and detects the electric field from the rebar 3 at a position corresponding to the plurality of rebars 3. Can be detected simultaneously.

  Moreover, since the detection main body 13 fixes the angle of the rotation block 15 and closely_contact | adheres to the outer peripheral surface of the utility pole 1, the reinforcing bar breakage state detection operation | work with respect to the various utility poles 1 from which a diameter differs can also be performed easily.

  On the other hand, FIG. 5 shows magnetic field data for a plurality of reinforcing bars in which a magnetic field is detected by applying an embodiment of the present invention. Referring to this, a portion where the change amount of the magnetic field is abrupt is confirmed, but it is detected that the reinforcing bar is in a broken state at a portion where the change amount of the magnetic field is abrupt.

[Other Embodiments]
Since other embodiments have a difference in the configuration of the detection unit compared to one embodiment, only the configuration of the detection unit will be described in detail.

  As shown in FIG. 6, the detection unit 40 includes a gripping part 41, a stabilizer bar 43, a detection main body 47, and an electric field detection part 55.

  The grip portion 41 is a portion that provides a grip region to the worker so that the worker can move the stabilizer bar 43 and the detection main body 47 in the vertical direction of the utility pole 1.

  The grip portion can be formed in a bar shape having a predetermined length so that the operator can easily grip the grip portion. Moreover, the holding part 41 can be comprised with a plastic material etc., and can make it easy for an operator to hold | grip.

  The stabilizer bar 43 is for supporting the detection main body 47. The stabilizer bar 43 is formed to provide a space that can be elastically deformed when the detection main body 47 is in close contact with the outer surface of the utility pole 1. The stabilizer bar 43 is fixed to one side extending from the grip portion 41, and the other side is extended to bend in a direction away from the grip portion 41.

  One side of the stabilizer bar 43 can be fixed to one side extending from the grip portion 41 using a bolt or the like. A fixing hole 43 a is provided on the other side of the stabilizer bar 43. A connecting portion 46 for fixing the other side of the detection main body 47 can be hooked and fixed to the fixing hole 43a. The stabilizer bar 43 can be formed of a metal material to ensure rigidity.

  The detection main body 47 provides an installation area for the magnetic field detection unit 55 and is in close contact with the outer surface of the utility pole 1 so that the magnetic field detection unit 55 can detect the magnetic field of the rebar 3 embedded in the utility pole 1. To.

  One side of the detection main body 47 is rotatably coupled to one side extending from the grip portion 41, and the other side is connected to the stabilizer bar 43 via the elastic means 45. In addition, the detection main body 47 is in close contact with the outer surface of the utility pole in the circumferential direction by elastic deformation.

  The elastic means 45 may be a spring that is coupled to the other side of the detection body 47. One side of the spring is coupled to the other side of the detection body 47, and the other side is fixed to the connecting portion 46. The connecting portion 46 has a string shape, and is fixed to the stabilizer bar 43 by fixing the other side of the detection body 47 to the stabilizer bar 43 by being hooked and fixed to the fixing hole 43a of the stabilizer bar 43. Enable elastic deformation in the bar direction.

  The detection main body 47 includes a plurality of chain blocks 49 and an elastic band 53.

  The detection main body 47 connects the chain block 49 to form the detection main body 47, and the angle of the chain block 49 connected to each other is adjusted by elastic deformation, and will be described later at a position corresponding to the reinforcing bar 3 embedded in the electric pole. The magnetic field detection unit 55 is arranged.

  The chain block 49 may have a substantially “H” shape, and may be interconnected in a manner in which the tip is fitted and fixed to the rotating portion 51 at the rear end of the opposite chain block 49. Alternatively, the chain block 49 may be interconnected by a method in which the tip of the chain block 49 is disposed so as to overlap the rear end of the other chain block 49 and then the overlapping portion is fixed by the rotating portion 51.

  The rotating portion 51 can connect the chain block 49 and the chain block 49 adjacent to each other to fix the coupled state of the chain block 49 and the chain block 49.

  The elastic band 53 is connected by crossing between the chain blocks 4. The elastic band 53 provides an elastic force in a direction in which the detection main body 47 is in close contact with the outer circumferential surface of the utility pole 1. After the elastic band 53 is installed so as to pass between the chain blocks 49, the end can be fixed to the elastic band 53 using an adhesive or the like.

  When the detection main body 47 is brought into close contact with the outer surface of the utility pole, the angle of each chain block 49 is adjusted while being pushed in the direction of the stabilizer bar 43 by the elastic means 45 to correspond to the outer surface of the utility pole 1. In this process, the elastic band 53 installed so as to pass between the chain blocks 49 pushes each chain block 49 in the circumferential direction, so that the detection main body 47 can be in close contact with the outer surface of the utility pole.

  That is, the elastic means for elastically deforming the detection body in the direction of the stabilizer bar interacts with the elastic band that pushes the detection body in the direction of the utility pole, thereby bringing the detection body into close contact with the outer surface of the utility pole.

  If only the elastic member is installed without installing the elastic band, it is difficult for the detection main body 47 to be in close contact with the outer surface of the electric pole 1 along the outer periphery of the electric pole, and there is a possibility that a floating part between the electric pole 1 and the detection main body 47 is generated. There is.

  The magnetic field detection unit 55 can be configured by a plurality of units installed at regular intervals along the length direction of the detection main body 47.

  Specifically, the magnetic field detection unit 55 is installed on each side of the plurality of chain blocks 49 and detects an electric field generated from the reinforcing bar 3 in a state where the plurality of chain blocks 49 are in close contact with the outer surface of the utility pole 1. The magnetic field detector 55 can be embedded and installed on one side of each chain block 49. In the present embodiment, the magnetic field detector 55 is embedded in the center of each chain block 49.

  The magnetic field detection unit 55 may be a magnetic sensor that measures a magnetic field that is a current generated from the reinforcing bar 3 by an electromagnetic induction phenomenon.

  A receiving portion 57 is further provided on one side extending from the grip portion 41. The receiver 57 receives the electric field signal detected by the magnetic field detector 55 and transmits it to the data logger unit 20. The receiving unit 57 has a box shape, and various devices for receiving an electric field signal can be provided therein.

  Hereinafter, the operation of other embodiments will be described.

  First, a method for detecting a reinforcing bar breakage by bringing the detection body into close contact with the outer surface of the utility pole in the circumferential direction will be described.

  For this reason, as shown in FIG. 7, the detection main body is brought into close contact with the outer surface of the utility pole while the operator holds the grip portion 41.

  When the detection main body 47 is brought into close contact with the outer surface of the utility pole 1, the angle of each chain block 49 is adjusted while the detection main body 47 is pushed in the direction of the stabilizer bar 43 by the elastic means 45 to correspond to the outer surface of the utility pole 1. . In this process, the elastic band 53 installed so as to pass between the chain blocks 49 pushes each chain block 49 in the direction of the utility pole, so that the detection main body 47 can be kept in close contact with the outer surface of the utility pole 1, The magnetic field detector 55 installed in each chain block 49 can detect the magnetic field of the reinforcing bar 3 at the position corresponding to it.

  Thereafter, as the gripper 41 is moved upward, the plurality of chain blocks 49 move upward together with the stabilizer bar 43, and the electric field detector 55 can detect the magnetic field of the reinforcing bar 3 in the length direction.

  Even when the diameter of the utility pole 1 changes in the process of moving the grip portion 41 upward, the elastic band 53 pushes each chain block 49 in the direction of the utility pole, so that the detection body 47 can be kept in close contact with the outer surface of the utility pole. Thereby, the electric field generated from each reinforcing bar 3 can be detected along the length direction of the reinforcing bar 3.

  The magnetic field data for the reinforcing bar 3 detected by the magnetic field detector 55 is transmitted to the receiver 57 and then stored in the data logger unit 20.

  The breakage state detection unit 30 can detect a magnetic field change for each reinforcing bar 3 based on the magnetic field data stored in the data logger unit 20, and can detect a broken state of the reinforcing bar based on the amount of change in the magnetic field.

  As described above, other embodiments do not need to perform an operation of adjusting the angle of the detection main body so as to correspond to the outer periphery of the utility pole, and thus are easy to use.

  Even when the detection main body 47 is moved upward in a state where the upper and lower diameters of the electric pole 1 are in contact with the outer surface of the electric pole 1, the detection main body 47 is always kept in close contact with the outer surface of the electric pole 1. Therefore, it is easy to detect the magnetic field.

  The scope of right of the present invention is not limited to the above-described embodiments, but is defined by what is described in the claims, and those having ordinary knowledge in the technical field of the present invention are described in the claims. It is obvious that various changes and modifications can be made within the scope of the right.

Claims (8)

A detection unit for detecting an electric field generated from the reinforcing bar at a position corresponding to a plurality of reinforcing bars embedded in the utility pole, in close contact with the outer surface in the circumferential direction of the utility pole;
A data logger unit for receiving and storing magnetic field data applied to the reinforcing bars detected by the detection unit;
A rupture state detection unit for detecting a rupture state of the reinforcing bar based on a magnetic field change amount of magnetic field data stored in the data logger unit. The detection unit is
A gripper for providing a gripping area to an operator;
A detection body that is rotatably coupled to one side of the gripping part and is curved so that one side surface is in close contact with the outer surface of the power pole in the circumferential direction;
2. The reinforcing bar breakage detecting device for electric poles according to claim 1, further comprising a plurality of electric field detecting units installed at regular intervals along the length direction of the detection main body.   The electric pole reinforcing bar breakage detecting device according to claim 2, wherein the detection body is formed by bending a plurality of rotation blocks so as to be capable of mutual rotation via a fixing member.   The electric pole rebar break detecting device according to claim 2, wherein the fixing member is configured by a bolt / nut system, and fixes a coupling state between adjacent rotating blocks.   The apparatus of claim 3, wherein the electric field detection unit is installed in the rotating block. The detection unit is
A gripper for providing a gripping area to an operator;
A stabilizer bar that is fixed to one side extending from the gripping portion and that extends so that the other side is curved away from the gripping portion;
One side is pivotally coupled to one side extending from the gripping portion, the other side is connected to the stabilizer bar via elastic means, and one side is closely attached to the outer circumferential surface of the utility pole by elastic deformation Detecting body to be
2. The reinforcing bar breakage detecting device for electric poles according to claim 1, further comprising a plurality of electric field detecting units installed at regular intervals along the length direction of the detection main body. The detection body is
A plurality of chain blocks coupled to each other via a rotating member;
The apparatus of claim 6, further comprising: an elastic band connected between the chain blocks.   The apparatus of claim 7, wherein the electric field detector is installed on the chain block.

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